package com.gky.gkytemplate.interceptor;

import com.auth0.jwt.interfaces.Claim;
import com.gky.gkytemplate.common.context.BaseContext;
import com.gky.gkytemplate.common.properties.JwtProperties;
import com.gky.gkytemplate.utils.JwtUtils;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Component
@Slf4j
public class JwtTokenInterceptor implements HandlerInterceptor {

    @Resource
    private JwtProperties jwtProperties;

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }
        //1、从请求头中获取令牌
        String token = request.getHeader("token");
        //2、校验令牌
        try {
            log.info("jwt校验:{}", token);
            Claims claims = JwtUtils.parseJWT(jwtProperties.getSecretKey(), token);
            System.out.println(claims);
            Long userId = Long.valueOf(claims.get("userId").toString());
            log.info("用户id：{}",userId);
            BaseContext.setUserId(userId);
            //3、通过，放行
            return true;
        } catch (Exception ex) {
            //4、不通过，响应401状态码
            response.setStatus(401);
            return false;
        }
    }
}
